Auth bypass in Getgrav Grav
CVE-2026-75835
Grav API plugin (getgrav/grav-plugin-api) before 1.0.14 contains a missing authorization vulnerability in userPassesAuthorize() (AbstractApiController.php). The function fails to consult the calling request's API key scopes, relying instead on the account's raw super-admin flag and ACL grants. As a result, an authenticated attacker holding a scoped API key minted on a privileged account can bypass their declared scope restrictions to access authorize-gated UI metadata and item definitions (sidebar/menubar/widget items and users-list columns/row-actions/filter-tabs) that their key scope should deny, resulting in information disclosure.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (21.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
Weakness classification (CWE)
References
- github.com/getgrav/grav/security/advisories/GHSA-p57v-xhv3-mf2w (vendor-advisory)
- www.vulncheck.com/advisories/grav-api-plugin-before-missing-authorization (third-party-advisory)
Frequently asked questions
- What is CVE-2026-75835?
- CVE-2026-75835 is a medium-severity vulnerability in Getgrav Grav, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-08-18.
- How severe is CVE-2026-75835?
- Medium severity. CVSS v3 base score is 4.3 out of 10.